1 files changed, 9 insertions, 0 deletions
diff --git a/app/models/version.rb b/app/models/version.rb
index b8c7b6f60..9910700f2 100644
--- a/app/models/version.rb
+++ b/app/models/version.rb
@@ -227,6 +227,10 @@ class Version < ActiveRecord::Base
     sharing != 'none'
   end
 
+  def deletable?
+    fixed_issues.empty? && !referenced_by_a_custom_field?
+  end
+
   private
 
   def load_issue_counts
@@ -288,4 +292,9 @@ class Version < ActiveRecord::Base
       progress
     end
   end
+
+  def referenced_by_a_custom_field?
+    CustomValue.joins(:custom_field).
+      where(:value => id.to_s, :custom_fields => {:field_format => 'version'}).any?
+  end
 end